Bag container



G. A. MOORE May 6, 1958 BAG CONTAINER 2 Sheets-Sheet 1 Filed July 12.1956 INVENTOR.

May 6, 1958 MOORE 2,833,094

' BAG CONTAINER Filed July 12. 19 56 2 Sheets-Sheet 2 INVENTOR.

United States Patent Ofice I,

' 2,833,094 Patented May 6, 195 8.

BAG CONTAINER George Arlington Moore, New York, N. Y. Application July12, 1956, Serial No. 597,419 16 Claims. (or. 53-14 This inventionrelates to containers, and more particularly to novel means and methodsfor converting a fabri cated conventional bag into a reinforcedcontainer of rectangular cross section and being heat sealed toconstitute a substantially air tight structure. When convertingtransparent plastic bags into containersof this invention, a novelcarton-like container is formed to visibly display its intended contentsthrough front and back panels of substantially large surface areasprovided by the novel enclosure wall structure of the container.

Many attempts have previously been made to devise a suitable structurethat may be inserted into bags with which to shape and reinforce theflexible and fragil walls thereof. But difiiculty has been experiencedto properly reinforce the bag in the region of its open mouth and afterfilling the bag with intended contents close and lock the wall portionof the insert that must be associated with the open mouth of theparticular bag. In my co-pending application Serial No. 492,584 filedMarch 7, 1955, a novel arrangement is disclosed whereby a novel articleof manufacture is' provided.v for the above purpose.

.The present invention constitutes an improvement on the invention ofthe prior application with respect to a novel means and method forinserting the above article, and one'of the prime objects herein is toprovide a novel arrangement for converting a conventional bag into acarton-like container having a substantially rigid wall structure toaugment the weakness of the fragil wall structure of the bag component.7

Another object of the invention is to provide in a container of theabove type, a novel arrangement for reinforcing the bag component acrossthe open mouth thereof prior to the filling of the container with itsintended commodify.

A further object of the invention is to provide a novel means and methodfor inserting a manipular frame constituting the above article ofmanufacture into a fabricated bag, the frame having two opposing sidewalls connected with opposite end walls to constitute a parallelogram.

Still another object of the invention is to provide a blank that may befolded and secured to constitute the above manipular frame.

Yet another object of the invention is to provide anovel means andmethod for using the above frame for the purpose of packing articles ofmerchandise into'conventional transparent bags.

Another object of the invention is to provide in a conventional bag aframe of substantially rigid material having walls of cross sectionaldimensions that is substantially coincident with the cross sectionaldimensions of the walls of the opened bag whereby the latter walls aredrawn tautly across surfaces of the above frame by action of itsmanipular form.

A further object of the invention is to provide a novel means and methodfor inserting a manipular frame of substantially rigid sheet materialinto a conventional fabricated transparent plastic bag in a manner thatwill insure against damage to the fragil plastic sheet material of thebag.

, Other objects and novel features of the invention will appear morefully hereinafter from the following detailed description whenconsidered in connection with accompanying drawings. It is to beexpressly understood, however, that the drawings are utilized forpurposes of illustration only, and are not to be taken as a definitionof the limits of the invention, reference being had for this purpose tothe appended claims.

In the drawings, wherein similar reference characters refer to similarparts throughout the several views;

Fig. 1 is a plan view of an elongated blank adapted to be formed'intothe manipular frame of the above yp of the blank;

Fig. 3 is a plan view of the blank folded and secured in collapsed formconstituting the manipular frame;

- Fig. 4 is a side elevation of a conventional plastic bag engaged withfragmentary parts of apparatus and showing the initial stage ofinserting the manipular frame into the bag;

Fig. 5 is another side elevation of bag and frameshowingthe efiects tothe bag by the further manipulated action of the frame;

Fig. 6 is still another side elevationof bag and frame showing theinsertion complete after removing the assembled components from theapparatus;

Fig. 7 is a fragmentary view in perspective showing the open mouth ofboth bag and inserted frame; 7 V

Fig. 8 is a plan view of a conventional transparent plastic bag on afragmentary portion of apparatus and a modified manipular frame upon theapparatus containingan article of merchandisebeing inserted into thebag; i v

Fig. 9 is a cross sectional view of bag and frame on the apparatus andtaken along line 9-9 of Fig. 8, and i Fig. 10 is a view in verticalperspective of the completed carton-like display container after havingbeen filled with its intended product andthe components being sealedseam forming relationship.

The present invention is particularly directed to a, means and methodfor manipulating the bag shaping and. reinforcing frame component intothe bag component whereby the resultant container is self-supporting,easily filled with intended product and then closed and sealed by afolded portion of the side walls of the bag component over the openmouth wall portion of the reinforcing inner frame component. The wallsof the manipular frame are each provided with opposite marginal flangesfreely articulated thereto continuously along corner edges and havingmitre forming ends that form mitred joints when the frame is completelyinserted into the bag componentwhereby the walls of the bag are drawntautly over the exterior surfaces of the frame walls augmented by thefreely articulated flanges thereof. In order to avoid the tearing orfracturing of the fragile walls of the bag component, each of the cornerbase ends of the above mentioned mitred joints is provided with an opensection that prevents the forming of sharp barbs of frame material atconverging corner ends of the walls thereof when being manipulated intothe bag 9 component to tightly draw the walls thereof tautly over theframe.

7 Referring more particularly to Fig. 1, the present invention isillustrated therein as including anelongated strip blank ofsubstantially rigid sheet material that may be treated with wallprotective coating of suitable plastic or wax compounds. Alternatively,the blank sheet material may be laminated with plastic film or aluminumfoil for surface protection if desired. The blank 4 is separated bymeans of transverse scored lines 5 and longitudinal Fig. 2 is anenlarged plan view of a fragmentary portion lines 6 extending thelengthofthe blank to define panels 7, 8, 9 and 10. Panel 10 is providedwith a connector tab portion 11 extending outwardly of a scored line 5.Panel Sis provided with a substantially centralopen section 12 havingedges 13 spaced inwardly of boundary defining lines 5 and 6 of thepanel. Panels 7 and 9 are provided with opposite flange forming marginalportions 14 extending outwardly ofscored lines 6. Panels 8 and 1 areprovided with similar marginal portions 15. The opposite ends of flangeforming portions 14 and 15 are provided with mitre forming edges 16 thatslope inwardly of the outer longitudinal parallel edges of the blank andterminate at the edge of a hole 17 lraving a center substantially on theintersection point of scored lines and 6 V This mitre formingarrangementis illustrated in Fig. 2 and represents the particularrelationship of panels and flange ends thereof with respect to thesemitre forming joints at terminal ends of the transverse scored lines 5of the blank in general. Outer defining terminal ends of the blank eachhaving a half portion of the mitre forming edges and hole.

Referring now to Fig. 3 ular frame 19 of this invention as folded of theblank 4 in flatly collapsed form. While the open section in panel 8 maybe embodied in panel instead of panel '8 if desired, I prefer thearrangement illustrated in Fig. 1 in this respect. For purpose ofillustration, panel 10 of the blank is folded upwardly, inwardly anddownwardly on the inner defining scored line 5 to lie upon acorresponding portion of the adjacent panel portion 9, the tab portion11 of the folded panel thereby being flatly supported and its upperface, having a pre-app lied coatingof adhesive in tacky condition. Panel7 is then folded on its defining transverse scored line 5 upwardly,inwardly and downwardly upon panel 8 and the adjacent portion of panel9. A marginal portion adjacent the terminal end of folded panel 7engages upon the tacky adhesive upon the upper surface ofthe tab portion11 of the previously folded panel 10 and thereby securing end portionsof folded panels 7 and 10 contiguously together as illustrated in Fig.3. o o 7 o The blank 4 is arranged to be cut and creased on conventionalpresses used in the folding carton industry and the folding of the blankto form the collapsed frame 19 being done on conventional cartonfolding. machines used in the industry. It is contemplated, however,that the blanks 4 may be economically cut and creased in multiplequantity in a sheet, after which the sheetis folded and secured as abovedescribed for the single blank 4 and then the individual units beingseparated from each other on cut defining lines constitutinglongitudinal parallel edges of the folded collapsed frame 19. Ifdesired, the blanks 4 may be printed on conventional presses used forprinting conventional folding cartons. The flat collapsed form of theframe 19 affords economical storage and transportation to packers. V IReferring to Figs. 4 and 5, the method of the present invention isillustrated therein for inserting the frame 19 into a conventionalfabricated bag 20, the particular bag being made of transparent plasticsheet material such as polyethylene, cellophane, pliofilrn or othersuitable plastic sheet material though any type of bag having a sealedbottom end may be converted into a carton-like container of thisinvention. The bag 20 usedfor purpose of illustration is of the wellknown gusset pleated type, the longitudinal body seam thereof not beingshown to constitute a bag formed of an extruded tube having a sealedbottom end margin 21.- The flat bagmay be initially opened by compressedair to threadthe bag over the top surface of a thin flat bar 22 ofstainless steel, aluminum or other suitable material. Theouter'up-turned end 23 .of the bar may be fastened upon a support in anysuitable manner desired. The width ofb ar22 is su bstantially coincidentwith the 'width of the opened pleat of the bag upon thebar. -A baggripping plunger 24 maybe engaged there is illustrated the manip-'downwardly upon the threaded wall portion of the bag adjacent the openmouth thereof to temporarily hold its position upon the bar for theinsertion of the frame 19. A small tube 25 connected with a source ofcompressed air is'bent to direct a jet of air into the bag during theinitial steps of inserting the partially opened frame 19 into theinterior of bag enclosure walls. The jet of compressed air inflates thebag to open for easy entree of the frame as illustrated in Fig. 4. Thepanels 7, 8, 9 and 10 of frame 19 are swingingly connected at theirrespective corner endsthereby constituting a parallelogram having openopposite sides bordered by freely articulated flanges 14 and 15 bentinwardly ,at substantially right angles of their corresponding panels.Panels 7 and 9 will positively remain in parallel relationship with eachother regardless of the angle of inclination of panels 8 and 10 whichalso remain in parallel relation. As the frame is opened, flanges 15 ofpanel 10 are preferably placed into position to overlap meeting adjacentsurface portions of flanges 14 of panels 7 and 9, which flanges overlapmeeting adjacent surface portions of flanges 15 of panel 8. Hence, whilethe parallelogram is being manipulated into the bag, edge portions ofthe flanges that would otherwise foul the end edges at the open mouth ofthe bag is avoided. The bag component 20 is freely suspended from bar 22so that frame 19 slides inwardly of the bag upon the interior surface ofthe opposite pleated wall 26 thereof which is 1 spread open by panel 9and by the articulated corner end thereof with panel 10 as theparallelogram is manipulated into the bag as illustrated in Fig. 5. Nearthe finishing stage of exerting pressure inwardly upon end panel 8 ofthe parallelogram, panel] is raised upwardly.

as a result of the lesser angle of inclination taken by panels 8 and 10whereby the upper end of panel. 10 squares the upper corner end of thebag augmenting the squaring effects of the end of bar 22 in thisrespect. In this position, the bag and inserted frame may be withdrawnfrom bar 22, plunger 24 releasing its grip upon the bag, the plunger notshown in Fig. 5. The walls of thebag are yet to be drawn tightly tautover the frame in order to allow freedom of withdrawing the bag from thebar and compensate forthe displacement space that may be cccupied by thebar dependent upon its thickness required for support of the particularbag to be, converted.

Fig. 6 illustrates the completed [form taken by the parallelogram framewithin the interior of the bag after squaring the frame. Panels 8 and 10thereof being positioned at right angles with respect to panels 7 and '9which.

have been expanded in parallel coincident with the height of panels 8and 10. The walls of the conventional fabricated bag component opposesthe expanding pressure exerted by the frame whereby the side walls andbottom end wall of the bag are drawn tautly over the coincident walls ofthe frame and spreads two opposed side walls of the bag tautly from theresilient flange portions of panels over the open opposite, sides of theframe that constitute window panels. The ends of flanges form mitredjoints to keep the flanges in coplanar surface relationship within thebag and stiffen the wall portions of the frame. The hole provided at thecorner base of each mitred joint providing means that protects thefragil walls of the bag a from being torn when expanding theparallelogram to squared form within the bag as illustrated in Figs. 5and 6. The converted container 27 is illustrated in Fig. 7 showing thearrangement provided for the open mouth thereof for filling intendedcontents into the carton-like container. Panel 8 of the inserted framehas an open area 12 originally provided in blank 4. The side walls ofthe bag component project outwardly of this opening to provide meanswith which to close and seal the opening 12 after a filling of thecontainer. It is generally recognized that conventional fabricated bagsare used daily for the distributionof a large variety of eatable foodproducts and articles of merchandise, because they are capable of beingheat sealed tightly, in fact, air-tight. The breakage, however, ofcontents packed therein is considerable due to the fragil structure of"these bags. The converted container27- of the present invention utilizethe closing efiiciency of these bags to seal the converted container aswell as protect the contents thereof against breakage as illustrated inFig. showing the filled and sealed carton-like container. The projectedwall portion of the side walls of the bag component-illustrated in Fig.7 are spaced outwardly. of the edges 13 of opening 12 in the inwardlyspaced panel 8 of the shape forming frame. This permits the end of thefilling hopper to enter into the opening 12 for a discharge of theparticular product to enter into the container 27. The material of thepanels and fiangesof the interior frame are substantially rigid and willsupport a major portion of the container contentsto minimize itspressure exerted upon the tautly spread walls of the bag component overopposite. open sides of the interior frame. a

The projected wall portions of the bag may be folded to close thecontainer 27 in any-desired conventionally practiced manner of closingthe bag itself. The preferable fold is illustrated in Fig. 10. Themarginally opposed portions of the gusset folds 28 prior to beingrefolded flatly downward upon the top of the container, extends upwardlyacross this top end in vertical position for contacting heat sealingirons that seals the margin transversely of, the plane of .the end wallof the container. Hence, the top end wall of the converted container isnot subjected to pressure for sealing purposes. Just prior to effectingthe seal of the folds over the top of the container, the side walls ofthe bag are preferably drawn taufly upward by adjusted pressure to beexerted inwardly to form the opposing gusset folded portions of theclosure forming folds by the folding tools employed. Due to the factthat the frame 19 is firmly locked within the tautly drawn enclosurewalls of the sealedbag component part of the container the rectangularform thereof is substantially fixed and rigid, so .that whengrasping'the end thereof for handling purposes the walls of thestructure will remain substantially rigid and be substantially free fromwall dis- 7 tortion effected by the weight of contents in the container.Therefore the converted container of the present invention may be easilysealed to be air-tight and is reinforced in such novel manner as toafford large area of front and back transparent panels for visibledisplay of the containers particular product thus, constituting markedimprovements on conventional bags by themselves, window cartons andoverwrapped trays. p v

A further modification of the present invention that is particularlyadapted for packaging articles of merchandise is illustrated in Figs. 8and 9, wherein a shirt is contained within confines of a slightlymodified manipular frame 30 shown in a preliminary stage of beinginserted into a conventional type of fabricated transparent bag 31'commonly used by itself for such purpose. The shirt is intended to be asymbol with which to illustrate the improved novel form for packaging awide variety of textile'products and soft goods in general that may: bepackaged for sale through department store retail outlets. The frame 30is similar in construction to the frame 19 shown in Figs. 3 and 4 and isformed of a similar blank as shown in Fig. 1 except it is not necessaryto provide an opening in an end panel of the frame unless desired forspecial purpose. first step for packaging the shirt illustrated in Fig.8 is to place the opened frame 30 in squared form flatly upon the topface of an elongated strip 32of apparatus made of suitable rigid sheetmaterialthat isprojected outwardly of any suitable support meansdesired. The strip may be inclined downwardly if desired. The shirt isplaced within.

inflatcthe bag 31 so that the open mouth-thereof rnay be easily drawnover the suspended'end 34 of the projected strip 32 and over a portionof the filled frame which-is flexed in parallelogram form so that itwill easily slide on the face of the strip and be pushed into the bag.The general form to be taken by the parallelogram is dominated by oneend panel thereof which may be manipulated to change the form while inthe bag as hereinbefore described for the frame 19 illustrated in Figs.4, 5, and 6. A relatively small angle of inclination of the, oppositeparallel ends of the filled frame is suificient to reduce the dimensionspaced between the longitudinal parallel sides of the frame to besubstantially less than the open width of the bag including the strip 32that temporarily supports the frame as illustrated in Fig. 9. Hence, theframe may be easily squared within the bag as is shown in its finalposition by dot and dash lines 35 indicating the squared frame thatdraws the walls of the bag taut. The bag and frame is then removed fromthe strip 32 and the outwardly projected wall portion that constitutesthe open mouth of the bag component 31 may be folded to form a closureof the converted container and be marginally heat sealed as hereinbeforedescribed for the closure formed on the top end of the convertedcontainer 27 illustrated in Fig. 10 thus, there is formed a novelcontainer that is sealed airtight and strongly reinforced for protectionof the article packaged :and include the facility for an attractivedisplay of the packaged product similar to the facility afforded by theconverted container 27 previously described in connection with Figs. '6and 10.

The above modification of the invention has been illustrated anddescribed to afford a better understanding of the many varieties ofproducts that may be packaged for better protection and improved salesappeal as compared with conventional forms of packaging these variousproducts. As a result of this disclosure and supporting illustrations,it will be understood, however, that various changes may be made thereinwithout departing from the Reference will therefore be had spirit of theinvention. to the appended claims for a definition of the limits of theinvention.

What is claimed is: a

l. The method of forming a carton-like container of two component partsto provide four side walls arranged in opposing pairs and a closed end,which comprises utilizing a conventional heat-sealed bag of transparentplastic sheet material constituting the first component, opening saidbag to receive an insertion of a substantially rigid four paneled frameconstituting the second component and capable of being manipulated inthe form of a parallelogram, reducing the dimensional width of the frameby manipular action taken to be less than the coincident dimens'ionalwidth of said opened bag during said insertion thereinyexerting pressureupon an end panel of said frame that is adjacent the open mouth of saidbag thereby squaring the frame within the bag to tautly draw the wallsof the bag over the coincident walls of said frame, providing asubstantially central open section in said end panel portion that is'inthe open mouth of said bag to be used for prises utilizing a flatfabricated bag having a longitudinal body sealed seam and a bottomsealed seam, said bag constituting the first of said component parts,opening the mouth of said bag and inserting into the bag a fabricatedfolded and secured frame of substantially rigid sheet material, saidframe constituting the second component part and forming a parallelogramhaving defining opposite transverse sides open, manipulating saidinserted frame to bring its ,wall forming panelsinto directcontactcoincident "walls of the bag component'whereby two opposing side wallportions of the latter walls are substan tially stretched across saidopen sides of the frame, providing an opening in the one panel ofi'saidframe positioned inwardly of the open mouth of the bag component forpurpose of providing means through which to fill the constructedcontainer and the wall portion defining the open mouth of said bagproviding means for closing said mouth over said opening in the onepanel in seam forming relationship. a

3. The method of making a carton-like container formed of two un-likecomponent parts adapted to be assembled together to construct saidcontainer, which comprises opening a flat fabricated bag thatconstitutes the first of said component parts and inserting therein afabricated frame, providing said frame with four connecting wall formingpanels constituting a parallelogram consisting of two oppositelongitudinal parallel walls and two opposite transverse parallel endwalls, sloping said end walls of the frame to reduce the width betweensaid longitudinal walls thereof while inserting said frame into theslack walls of the bagand then pressing upon an end wall of the insertedframe that is adjacent the open mouth of the bag to square therelationship of saidfour panels thereof whereby the slack walls of thefirst component are drawn tautly smooth over the coincident walls of thesecond component to construct said container, the wall portion of thefirst component that defines its open mouth providing means to closesaid container in seam forming relationship. i I

4. The method of making a container having a closed end and a pluralityof side walls arranged to provide a rectangular cross section from theeffects of .a folded elongated blank having four continuous panels ofequal width and being provided with opposite parallel flangesarticulated thereto along longitudinal corner edges thereof, twolongitudinally spaced panels of the blank having.

ends secured together to form a frame that may be articulated alongcorner ends of said panels to constitute a parallelogram to be insertedinto a fabricated transparent plastic bag that is provided withheat-sealed seams and an open mouth, which comprises temporarilyinflating said bag with compressed air to open the bag, inserting saidframe while partially collapsed within the enclosure walls of said bagand after said insertion squaring the frame to expand its walls againstthe enclosure walls of the bag to provide a coincident rectangular crosssection of both frame and bag whereby portions of the transparent wallsof said bag are tautly drawn over said articulated flanges of the frameand spreading smoothly over opposite open sides thereof to constitutewindow panels front and back of the formed container, one end panel ofsaid frame 8 defining the transverse ends of each panel of said frame,adjustingthe frame so that two opposing end panels thereof slopeinparallel and inserting the adjusted frame into said plastic bag,pressing inwardly upon one of said sloping panelsof the inserted frameto expand the alternate pair of opposing parallel panels thereof againstcoincident portions of the enclosure walls of the bag whereby otherportions of said walls thereof are drawn tautly inward upon the surfacesof said flanges at substantially right angles with respect tocorresponding panels and smoothly spreading said other portions over theopen opposite sides of the frame, said sloping edges of the flangesforming mitred joints within the bag and said edge defining holes at thebaselof the mitred joints preventing sharp barbs of the rigid materialof the frame from forming while manipulating said frame to panel squaredform within said bag, providing one end panel of said sloping panelswith a rectangular shaped hole with defining edges spaced inwardly ofcorner defining edges of the panel transverse of anou'twardly projectingportion of side walls defining the open mouth of said bag, shaping thebottom end of said bag to be coincident with the shape of the oppositeend panel of said frame whereby the structure of said tubular containerof rectangular cross section is formed of the bag shaped and reinforcingframe, filling said cont ainer with the intended product through theopen mouth of the bag and opening in said end panel, and effecting aclosure of the container by folding said wall projecting portion of thebag in seam forming relationship and thereby locking said frame withinthe taut enclosing walls of the bag, said smoothly spread transparentwall portions of the bag over open sides of the frameproviding means forattractive visible display of the product sealed in said container.

' forcing the particular bag to be of rectangular cross secforming acoincident shape to the heat-sealed bottom end of said bag and providingthe opposite end panel of the frame with an opening for a filling ofsaid container and arranging said opposite end panel to be spacedinwardly of the end edge of the bag defining the open mouth thereof,after a filling of the container, folding the portion'of the bagextending outwardly of said end wall to fo'rma heat sealed seam across amargin of opposing portions of the folds transverse of otherportionsthereof that covers the opening in said end wall, folding said sealedmargins downwardly upon a corresponding portion of saidother portions ofthe folds to constitute an air-tight closure of said container. 7

5. The method of shape forming a fabricated transparent plastic bag intoa tubular container of rectangular cross section and a'closed flatbottom end, which com prises forming a four panel frame of substantiallyrigid sheet material provided with connecting ends, arranging saidpanels with a pair of parallel opposite flanges articulated theretoalong corner edges thereof, providing opposite ends of each pair of saidflanges with inwardly slopingfedgifis erminating in junction with anedge definhole positioned central of each intersecting scored line tionprovided with a closed end, which comprises providing a frame with foursides arranged to constitute a manipular parallelogram, providing saidsides with flanges on opposite corner edges thereof and opposite ends ofsaid flanges arranged with mitreforming joints when squaring said frame,providing a flat strip of thin rigid material projecting outwardly of asuitable support, providing said strip with a width substantiallycoincident with the width established for the finished package and usingsaid strip for temporary support means for said frame and bag during thepacking stages for said merchandise, placing a flanged side of saidframe in substantially squared form flatly upon the top surface of saidstrip and filling said frame with the intended article or articles to bepackaged in the plastic bag, changing the squared formed of the filledframe by sloping theopposite endshthereof to "reduce the width of theframe to be less than the width of the frame supporting strip,drawing'said' bag over the projected end of the strip and over a portionof the flexed frame, then sliding said frame completely into the bag andpressing inwardly upon the and panel of the frame to square the panelsthereof at right angles to each othenthe flanges of panels formingmitred joints inwardly from converging corner ends of the panels of theframe, removing the assembly of the bag and frame from said strip andfolding the outwardly projected portion of the open mouth of the bagflatly upon the surfaceof the' end wall used to square the frame withinthe bag'and in seam forming relationship thereby sealing the'frarne'with article within tautly drawn transparent enclosure walls of saidbag.

7. The method of converting a fabricated transparent plastic fil'mlbaginto a tubular container of rectangular cross section and opposite flatend walls, which comprises providing a manipular parallelogram frameatranged 'with substantially rigid side walls and articulated ofopposite sides thereof that bring the other pair of alternate oppositesides toward each other reducing temporarily the width of said frame,opening said bag by inflating it temporarily with compressed air anddrawing the walls of the bag over said strip and filled frame, thenfurther manipulating said frame to square the relationship of sidesthereof by pressing inwardly upon one side of said sloping oppositesides that is spaced inwardly of the bag end that defines, the openmouth thereof whereby the enclosure walls of the bag are drawn smoothlytaut over surfaces of the frame and articulated flanges thereof coveringopen opposite sides thereof to constitute front and back panelleddisplaywindows, for the product carried into the bag by said framethereby completing the conversion of the bag into the form of saidtubular container, closing the container by manipulating the wallportion that defines said open mouth of the bag and into closure formingfolds thereof in seam forming relationship.

8. The method of constructing a frame adapted to be actuated in the formof a parallelogram to be used for shaping and reinforcing the walls of afabricated bag to constitute a container of rectangular cross sectionwith a closed reinforced bottom end, which comprises cutting andcreasing a flat elongated strip of substantially rigid sheet material todefine four continuous panels of equal width, providing one of saidpanels with an open cut section and further providing said four panelswith opposite parallel marginal flanges articulated thereto along corneredges thereof, providing said flanges with mitre forming joints withsloping edges of the mitre terminating inwardly in junction with theedge of a hole positioned substantially on the intersecting corner ofpanel defining creased lines, folding said blank on particulartransverse creased lines so that panels at opposite ends thereof arebrought into overlapping relationship upon connecting end portionsthereof and securing said end portions together to constitute saidframe-in flatly collapsed form, said frame being adapted to be openedand manipulated in progressive stages of a parallelogram suitable forinsertion into said fabricated bag and upon being squared therein shapesaid bag with tautly drawn walls rectangular in cross section, said opensection of one panel of the frame providing means to co-operate with theopen mouth of the bag through which to fill said container with theintended product, the wall portion constituting the open mouth of saidbag providing means to close the container in seam forming relationship.

9. The method of making a display container of rectangular cross sectionprovided with a flat bottom end and of utilizing a fabricatedtransparent plastic bag in conjunction with a manipular parallelogramframe of substantially rigid flat material to be inserted into said bagand manipulated therein to constitute said container, which comprisesproviding said frame with four continuing flat panels that are arrangedin a relationship of two opposed longitudinal panels and two opposedtransverse panels, arranging each pair of said panels so they may bearticulated thereto along hinging corner ends thereof with the adjacentrelated panels for the frame to be actuated in the form of saidparallelogram, inserting said frame into said bag while one of said pairof panels thereof are inclined at an angle less than ninety degrees withrespect to the other pair of related panels, and then manipulating oneof said inclined panels to actuate the opposite inclined panelconstituting said pair to take position substantially at right angles tosaid other pair whereby the enclosure walls of said bag opposes thepanels of 10 the frame to draw said enclosure walls tautly spread overthe panels and across the opposite open sidesof the frame therebyconstituting the structure of said display container, providing means insaid structure with which the container may be filled with intendedproduct and be closure formed in seam securing relationship.

10. The method of making a display container of rectangular crosssection with a flatly closed bottom end, and of utilizing a bag made oftransparent plastic film material having heat sealed seams and anopen'mouth, and of providing a manipular parallelogram frame to be usedin conjunction with said bag to form said container, which comprisesproviding said frame of substantially rigid sheet material with fourcontinuing panels that are arranged in a relationship of two opposinglongitudinal panels and two opposing transverse end panels, providingeach panel with a pair of opposing parallel flanges along corner edgesand bent inwardly thereof and with mitred inwardly sloping edgesconstituting mitre forming joints, providing a joint opening through thewall and flange of each said panel of the frame and positioning saidopening substantially on the center point of each of the intersectingcorner edges of said panels and flanges, said openings providing meansto remove sharp barbs of frame material otherwise forming at said cornerends, providing one of said end panels of the frame with an openingthrough the panel and with defining edges of the open section spacedinwardly of boundary corner edges of said end panel, arranging each pairof said panels so they may be articulated thereto along hinging cornerends thereof with the adjacent related panels for the frame to beactuated in the form of said parallelogram, opening said bag andinserting said frame therein, sloping said pair of end panels thereof,prior to said insertion, to reduce the dimensional width between said,pair of related longitudinal panels to be less than the width ofinserted frame provided with said opening, and squaring the frame withinthe bag drawing the enclosure walls thereof tautly over said panels andflanges of said frame without injury to the fragil plastic fihn materialof the bag due to said removal of sharp barb forming material of theframe, said flanges adjusting their respective angular relationship withrespect to corresponding panels according to the tension of the portionsof the bag enclosure walls that are drawn over opposite open sides ofthe frame therein, said mitred edges of flanges forming mitred joints bysaid tautly drawn walls of the bag, and the resiliency of said flangeskeeping said portions of enclosure walls of the bag tautly spread oversaid open sides of the frame thereby forming said container constitutedwith means to display its intended product, and after filling saidcontainer through the opening in said one end panel of the frame andopen mouth of the bag, manipulating the outwardly projecting wallportion cons'tituting said open mouth of said bag into closureformmarginal portions of said closure in seam forming relationship.

11. The method as set forth in claim 10 wherein providing a thin stripof rigid material suitably supported upon one end thereof, said stripproviding means for temporary support of said bag when suspendedthereupon including clamping means that may be actuated upon said stripfor purpose of clamping said bag upon a surface portion of the stripadjacent the open mouth of the bag, and providing means to keep thesuspended bag inflated with air during the initial stage of insertingsaid frame into said bag. I

12. The method of reinforcing and forming substantially rigid shape ofrectangular cross section to a fabricated heat sealed transparentplastic bag to constitute a carton-like container provided withtransparent wall portions arranged in opposing pairs and one of saidpairs sesame "T1 constituting product display windows for intendedcontents of'fsaid container,which-comprises opening said bag byeffecting 'a temporary inflation "thereof witlrc'ompres'sed-air whiledrawing said bag over a pfojected portion of a supported flat thin stripof rigid material and temporarily clamping a' wall portion of V said bagupon said strip adjacent the open mouth thereof, providing meansoutwardly of said mouth of theclamped bag to keep said bag mildlyinflated while inserting therein a panelled frame of substantially rigidmaterial but capable of being manipulated to constitute a parallelogramand providing one panel of saidframe with an opening, manipulating saidframe during the stage 'of inserting it into the bag to be in flexedform for easy insertion then squaring the frame to shape the enclosurewalls of the bag to take the form of said rectangular cross sec tion,removing the shapedbag and frame within from said strip therebyconstituting thejstrueture of said cartonlike container, the tautlydrawn exterior wall portions of the bag'that covers opposite open sidesof the interior frame, constituting said product display windows for theintended contents of said container, and after a'filling thereof,closing said opening in said one'panel of the frame by holding theportion of the bag tha-t defines the open mouth thereof to' form aclosure in seam forming relationship. a

13. The method of forming a carton-like container comprising the stepsof providing a flexible bag having a mouth opening at one end to receivea 'fr'ame having'four substantially rigid panels foldably connected inend-toend succession to define a deformable parallelogram, insertingsaid frame through the open mouth of the bag while said parallelogram ismanipulated so that the successive panels enclose angles other thanright angles to reduce the width of the frame to, less than that of thebag, and squaring. said parallelogram, when the frame is fully insertedwithin the bag, thereby to expand the width of the frame and cause thebag to be drawn tightly over the rigid panels of the frame and acrossthe open sides of the latter bounded by said panels.

a 14. The method as set forth in claim 13 wherein said bag is formed oftransparent material so that the contents of the container maybe viewedthrough the portions of the bag drawn across the opensides of the frame.p

15. The method "of forming a jcarton like container comprising'the stepsof providing'a 'tra'nsparent heatscalable bag having a mouth opening'atoneend to receiv a frame having four substantially rigid panels foldablyconnected in end-to-end succession to define a deformable parallelogram,each of said panels having marginal; side flange portions to be freelyarticulated thereto along longitudinal corner edges and having mitreforming ends, inserting said frame through the open mouth ofthe bagwhile'said parallelogram is manipulated so'that the successive panelsenclose angles other than right angles to reduce the width of the frameto less than that of the bag, and squaring said parallelogram when theframe is fully inserted within the bag, thereby to expand the width ofthe frame and cause the bag to be drawn tightly over'the rigidpanels ofthe frame, the tightly drawn walls of the bag causing the marginalflanges of the rigid panels to bend inwardly at substantially rightangles of their respective panels, by the bag wall portions that aretightly drawn across the open sides of the frame, thereby to resilientlysupport the suspension of said bag wall portionsand provide visibledisplay of container contents, folding the mouth opening of the bag overan inner disposed one panel end of the frame and heat sealing the foldsof the bag in seam-forming relationship. A p 1 a 16. The method onepanel end of the intended contents for the container can pass throughthe open mouth of the bag and through the opening in the panel'end into;the container prior to closing and sealing same. I

accordingto claim 15 wherein said the frame having an opening so thatReferences Cited in the file of this patent UNITED STATES PATENTS1,886,376 Dambacher Nov. 8, 1932 1,937,015 Gangler Nov. 28, 19332,102,508 1 Brooks Dec. 14, 1937 2,362,520 Zalkind Nov. 14, 19442,459,921 Comer Jan. 25, 1949

